Alert archive / Oklahoma / Tornado Warnings in 1991
Tornado Warning 10, NWS Norman, OK
NWS Norman, OK issued this tornado warning at Mar 21, 1991, 6:41 PM CST for Atoka County, Bryan County, Oklahoma. It was in force for 49 min. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Mar 21, 1991, 6:41 PM CST (00:41 UTC)
- Expired
- Mar 21, 1991, 7:30 PM CST
- In force
- 49 min
- Issued by
- NWS Norman, OK
- Area
- Whole counties
Counties Atoka County, OK, Bryan County, OK
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Mar 21, 6:55 PM CST | Tornado F0 | Atoka, OK | |
| Mar 21, 7:15 PM CST | Hail 1.75 | Bryan, OK |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Norman, OK (KOUN), launched 00:00Z, 0.7 hours before the alert went out and 164 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 2 J/kg
- Mixed-layer CIN
- -155 J/kg
- Mixed-layer LCL
- 1767 m above ground
- 0-6 km bulk shear
- 88 kt
- 0-1 km storm-relative helicity
- -66 m²/s²
- 0-3 km storm-relative helicity
- 27 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.1
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
What forecasters said that day
The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Mar 21, 4:32 PM CST, 2 hours 9 minutes before
TXZ020-019-212330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WICHITA FALLS TX 430 PM CST THU MAR 21 1991 TORNADO WATCH REMAINS IN EFFECT UNTIL 6 PM CST FOR THIS PORTION OF NORTH CENTRAL TEXAS AND SOUTHERN OKLAHOMA. A TORNADO WATCH FOR CLAY...JACK...MONTAGUE AND YOUNG COUNTIES WILL BE IN EFFECT UNTIL 9PM CST THIS THURSDAY EVENING. AT 430 PM...THE WICHITA FALLS RADAR SHOWED THUNDERSTORMS IN PROGRESS PRODUCING LOCALLY VERY HEAVY RAIN...GUSTY WIND AND POSSIBLE SMALL HAIL OVER PORTIONS OF CLAY AND MONTAGUE COUNTIES. THE HEAVIEST PORTION WAS LOCATED ALONG THE CLAY/MONTAGUE BORDER JUST SOUTH OF THE RED RIVER. ELSEWHERE...ANOTHER DEVELOPING THUNDERSTORM WAS NOTED NEAR OLNEY ALONG THE YOUNG/ARCHER COUNTY LINE. MOVEMENT WAS NORTHEAST AT 40 MPH. TODAYS HIGH TEMPERATURE WAS 82 DEGREES.
Special weather statement, Mar 21, 5:03 PM CST, 1 hour 38 minutes before
TXZ020-019-220000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WICHITA FALLS TX 500 PM CST THU MAR 21 1991 TORNADO WATCH REMAINS IN EFFECT UNTIL 6 PM CST FOR THIS PORTION OF NORTH CENTRAL TEXAS AND SOUTHERN OKLAHOMA. A TORNADO WATCH FOR CLAY...JACK...MONTAGUE AND YOUNG COUNTIES WILL BE IN EFFECT UNTIL 9PM CST THIS THURSDAY EVENING. AT 500 PM...THE HEAVIEST THUNDERSTORM ACTIVITY WAS OCCURRING IN NORTHERN MONTAGUE COUNTY. PERSONS ALLONG AND NORTH OF US82 IN MONTAGUE COUNTY... INCLUDING THE COMMUNITIES OF SAINT JO AND NACONA SHOULD EXPECT VERY HEAVY THUNDERSTORM TYPE WEATHER IN THE NEXT 30 MINUTES. ELSEWHERE...ANOTHER HEAVY THUNDERSTORM WAS OCCURRING ALONG THE ARCHER/ CLAY COUNTY LINE EAST OF ARCHER CITY. MOVEMENT OF THESE THUNDERSTORMS WAS NORTHEAST AT 40 MPH. ONLY A SCATTERING OF LIGHTER THUNDERSHOWERS WERE NOTED BETWEEN ABILINE...YOUNG AND JACK COUNTIES.
Special weather statement, Mar 21, 5:28 PM CST, 1 hour 13 minutes before
TXZ020-019-220025- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WICHITA FALLS TX 525 PM CST THU MAR 21 1991 TORNADO WATCH REMAINS IN EFFECT UNTIL 6 PM CST FOR THIS PORTION OF NORTH CENTRAL TEXAS AND SOUTHERN OKLAHOMA. A TORNADO WATCH FOR CLAY...JACK...MONTAGUE AND YOUNG COUNTIES WILL BE IN EFFECT UNTIL 9PM CST THIS THURSDAY EVENING. AT 530 PM...THE HEAVIEST THUNDERSTORM WAS OCCURRING BETWEEN ARDMORE OKLAHOMA AND THE RED RIVER. MOVEMENT OF THIS THUNDERSTORM WAS EAST NORTHEAST AT 35 MPH. ELSEWHERE...THUNDERSTORMS PRODUCING VERY HEAVY RAIN...FREQUENT LIGHTNING...GUSTY WINDS AND SMALL HAIL WERE NOTED ALONG AND SOUTHEAST OF A HENRIETTA...ARCHER CITY...OLNEY LINE. MOVEMENT WAS TOWARDS THE NORTHEAST. PERSONS IN MONTAGUE...CLAY AND ARCHER COUNTIES SHOULD EXPECT PERSISTENT THUNDERSTORM ACTIVITY FOR THE NEXT SEVERAL HOURS.
Special weather statement, Mar 21, 6:01 PM CST, 40 minutes before
TXZ020-019-220100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WICHITA FALLS TX 600 PM CST THU MAR 21 1991 TORNADO WATCH REMAINS IN EFFECT UNTIL 9 PM CST FOR THE FOLLOWING NORTH TEXAS COUNTIES...ARCHER...CLAY...JACK...KNOX...MONTAGUE... WICHITA...WILBARBER AND YOUNG. THIS INCLUDES COTTON COUNTY OF SOUTH CENTRAL OKLAHOMA. AT 6PM...THE STRONGEST THUNDERSTORM IN THIS PORTION OF NORTH CENTRAL TEXAS WAS LOCATED IN CLAY COUNTY BETWEEN HENRIETTA AND THE RED RIVER. LIGHTER THUNDERSTORMS WERE OCCURRING OVER PORTIONS OF MONTAGUE AND ARCHER COUNTIES. MOVEMENT WAS EAST NORTHEAST AT 35 MPH. A LINE OF INTENSIFING THUNDERSTORMS WERE NOTED FROM WEST OF DECATUR IN WISE COUNTY INTO PORTIONS OF PALO PINTO AND ERATH COUNTIES. PERSONS IN NORTHEAST CLAY COUNTY SHOULD EXPECT VERY HEAVY THUNDERSTORM TYPE WEATHER IN THE NEXT 30 MINUTES.
Special weather statement, Mar 21, 6:36 PM CST, 5 minutes before
TXZ020-019-220135- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WICHITA FALLS TX 635 PM CST THU MAR 21 1991 TORNADO WATCH REMAINS IN EFFECT UNTIL 9 PM CST FOR THE FOLLOWING NORTH TEXAS COUNTIES...ARCHER...CLAY...JACK...KNOX...MONTAGUE... WICHITA...WILBARBER AND YOUNG. THIS INCLUDES COTTON COUNTY OF SOUTH CENTRAL OKLAHOMA. AT 6PM...THE STRONGEST THUNDERSTORM AFFECTING THIS SECTION OF NORTH CENTRAL TEXAS WAS OCCURRING ON THE RED RIVER IN EXTREME NORTHERN MONTAGUE COUNTY. MOVEMENT WAS EAST NORTHEAST AT 35 MPH. ELSEWHERE...ISOLATED THUNDERSTORMS WERE NOTED OVER PORTIONS OF CLAY AND JACK COUNTIES. THESE THUNDERSTORMS WERE NOT CONSIDERED SEVERE. HOWEVER...CONDITIONS REMAIN FAVORABLE FOR RAPID INTENSIFICATION FOR THE NEXT SEVERAL HOURS. ESPECIALLY IN THE COUNTIES EAST OF WICHITA FALLS...THIS INCLUDES CLAY...MONTAGUE AND JACK COUNTIES. EARLIER...VERY HEAVY RAIN WAS REPORTED OUT OF HENRIETTA IN CLAY COUNTY. A LIGHTNING INDUCED HOUSE FIRE WAS ALSO REPORTED.
Special weather statement, Mar 21, 6:40 PM CST, 1 minute before
TXZ020-019-220135- SPECIAL WEATHER STATEMENT...CORRECTION TO TIME... NATIONAL WEATHER SERVICE WICHITA FALLS TX 635 PM CST THU MAR 21 1991 TORNADO WATCH REMAINS IN EFFECT UNTIL 9 PM CST FOR THE FOLLOWING NORTH TEXAS COUNTIES...ARCHER...CLAY...JACK...KNOX...MONTAGUE... WICHITA...WILBARBER AND YOUNG. THIS INCLUDES COTTON COUNTY OF SOUTH CENTRAL OKLAHOMA. AT 630 PM...THE STRONGEST THUNDERSTORM AFFECTING THIS SECTION OF NORTH CENTRAL TEXAS WAS OCCURRING ON THE RED RIVER IN EXTREME NORTHERN MONTAGUE COUNTY. MOVEMENT WAS EAST NORTHEAST AT 35 MPH. ELSEWHERE...ISOLATED THUNDERSTORMS WERE NOTED OVER PORTIONS OF CLAY AND JACK COUNTIES. THESE THUNDERSTORMS WERE NOT CONSIDERED SEVERE. HOWEVER...CONDITIONS REMAIN FAVORABLE FOR RAPID INTENSIFICATION FOR THE NEXT SEVERAL HOURS. ESPECIALLY IN THE COUNTIES EAST OF WICHITA FALLS...THIS INCLUDES CLAY...MONTAGUE AND JACK COUNTIES. EARLIER...VERY HEAVY RAIN WAS REPORTED OUT OF HENRIETTA IN CLAY COUNTY. A LIGHTNING INDUCED HOUSE FIRE WAS ALSO REPORTED.
The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 21, 6:00 PM CST | Tornado Warning | OUN | Bryan | 45 min |
| Mar 21, 6:03 PM CST | Severe Thunderstorm Warning | OUN | Jefferson, Love | 42 min |
| Mar 21, 6:15 PM CST | Tornado Warning | OUN | Pushmataha | 45 min |
| Mar 21, 6:19 PM CST | Severe Thunderstorm Warning | OUN | Carter, Johnston, Love, Marshall | 56 min |
| Mar 21, 6:58 PM CST | Severe Thunderstorm Warning | OUN | Pushmataha | 62 min |
| Mar 21, 7:07 PM CST | Severe Thunderstorm Warning | OUN | Bryan | 68 min |
| Mar 21, 7:10 PM CST | Tornado Warning | OUN | Bryan | 35 min |
| Mar 21, 7:15 PM CST | Severe Thunderstorm Warning | OUN | Johnston, Marshall | 60 min |
| Mar 21, 7:15 PM CST | Severe Thunderstorm Warning | OUN | Love | 60 min |
| Mar 21, 7:39 PM CST | Tornado Warning | OUN | Marshall | 36 min |
| Mar 21, 7:52 PM CST | Tornado Warning | OUN | Bryan | 23 min |
| Mar 21, 8:05 PM CST | Severe Thunderstorm Warning | OUN | Atoka, Pushmataha | 55 min |
| Mar 21, 8:11 PM CST | Severe Thunderstorm Warning | OUN | Choctaw | 64 min |
| Mar 21, 8:41 PM CST | Severe Thunderstorm Warning | OUN | Jefferson | 64 min |
| Mar 21, 9:25 PM CST | Severe Thunderstorm Warning | OUN | Carter | 65 min |
| Mar 21, 9:58 PM CST | Severe Thunderstorm Warning | OUN | Love | 47 min |
| Mar 21, 10:30 PM CST | Severe Thunderstorm Warning | OUN | Carter, Johnston, Marshall | 45 min |
| Mar 21, 11:01 PM CST | Severe Thunderstorm Warning | OUN | Coal, Hughes, Pontotoc | 59 min |
| Mar 21, 11:40 PM CST | Severe Thunderstorm Warning | OUN | Atoka, Bryan, Johnston | 65 min |
| Mar 22, 1:37 AM CST | Severe Thunderstorm Warning | OUN | Jefferson, Love | 53 min |
| Mar 22, 1:44 AM CST | Severe Thunderstorm Warning | OUN | Marshall | 61 min |
| Mar 22, 1:49 AM CST | Tornado Warning | OUN | Marshall | 26 min |
| Mar 22, 2:16 AM CST | Severe Thunderstorm Warning | OUN | Atoka, Bryan, Johnston | 59 min |
| Mar 22, 3:15 AM CST | Severe Thunderstorm Warning | OUN | Atoka | 45 min |
| Mar 22, 6:51 AM CST | Severe Thunderstorm Warning | OUN | Choctaw, Pushmataha | 69 min |
Nearby
Tornado Warnings in Oklahoma, 1991Every tornado warning in 1991Tornadoes in 1991
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.